Perhaps you should try some spelling variations:
cham quoc » chuan quoc, han quoc, cham soc
cua triet » cua viet, su triet, va triet
quoc suu » quoc su, quoc sieu, duoc sua
suu benh » sau benh, buou benh, so benh
te sach » toc sach
lang xa » lang ha, dang xay, lang van
hieu va » lieu va, hieu qua
va cham » va chat, va tham
benh vi » benh va, benh ve, benh li
cua tre » cua te, cuu tre, dua tren
y lang » o lang, _ lang, tay lang

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: te sach y lang xa hoi. hieu va cham quoc suu benh vi ((cua tre) or (cua triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach y lang xa hoi. hieu va cham quoc suu benh vi ((cua tre) OR (cua triet)).
• Adding a wildcard symbol may retrieve word variants: te sach y lang xa hoi. hieu va cham quoc suu benh vi ((cua tre) or (cua triet))*.